Rabbet-plane attachment



(No Model.)

0. A. WARFIELD.

RABBET PLANE ATTACHMENT.

N0. 295,3l6 Patented Mar. 18, 1884.

/ INVENTOge A TTORNEKS WITNESSES.-

UNITE STATES CHARLES A. \VARFIELD, OF PHILADELPHIA, PENNSYLVANIA.

RA B B ET-PLAN E ATTACH ENT.

SPECIFICATION forming part of Letters Patent No. 295,316, dated March 18, 1884.

Application filed September 18, 1883. (No model.)

To a-ZZ whom it may concern:

Be it known that I, CHARLES A. WARFIELD, a citizen of the United States, residing at the city of Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Rahhet-Plane Attachments; and I do hereby declare the following to he a full, clear, and exact description of the invention, reference being had to the accompanying drawings, which form part of this specification, in which- Figure 1 is a perspective of a plane with my attachment applied thereto. Fig. 2 is an end view, same parts as Fig. 1. Fig. 3 is a perspective of attachment.

My invention has for its object to providea gage or regulating attachment for a rabbetplane, whereby the width or depth of a rabhet cut may be controlled without employing a marker or equivalent device. My attachment consists of a-har provided with means for at taching it adj ust-ably to the face of a common plane or rahhet-plane, forming a guide or gage therefor, substantially as hereinafter fully set forth.

Referring to the accompanying drawings, A represents a common rabbet-plane, to whichmy attachment is applied. B represents the attachment, consisting of a bar, preferably of metal, with lugs or flanges b b at either end. One of these lugs is serrated, as shown at 0 on its inner side, while the'other lug has ascrew or equivalent lever, or other securing appliance, by which it is made fast to the plane. \Vhen the screw 0 is turned in, it draws the lug 6 against the opposite end of the plane, and so holds the attachment firmly on the latter. One side of the attachment constitutes a straightedge, If. The other side may be curved or of any desired configuration.

The attachment -is adjusted on the face of the plane, with the straight-edge b at the same distance from the edge a of the plane as will equal the depth or width of the-rabhet required to be cut. The plane is then ready for use. To cut rabbets of different widths or depths, the attachment must be correspondingly adjusted, such adjustment being very readily effected.

As will be seen, the attachment requires no changeto be made in the stock of an ordinary plane, and when removed permits the use of the latter in its ordinary manner.

To prevent the bit d of the plane from coining in contact with the attachment, the latter should have a transverse groove, as shown at If.

I am aware that it is not new, broadly, to provide a plane with an adjustable guide or gage for the purpose of cutting shelved or channeled surfaces; but such as I have any knowledge of have required a special adaptation of the plane to the purposes of the guide. I therefore do not broadly claim an adjustable rahbeting attachment, but limit myself to a guide of such a construction that it may be applied to any ordinary plane by simply clamping the attachment in place.

What 1 claim as my invention is The rabhet attachment for planes herein described, consisting ofloar B, having its upper or inner surface flat and transversely grooved, and provided with lugs b b and a screw, G, or equivalent means for securing said attachment to the plane, substantially as shown and set forth.

In testimony that I claim the foregoing I have hereunto set my hand this 7th day of September, 1883.

CHARLES A. VARFIELD.

\Vitnesses:

' LIsLn S'ronns,

WVILL H. POWELL. 

